having issues with things not appearing in collection on my website

Hi, I’m new to Shopify and I think I have manually added items to my collection but when I preview the site and click on a collection it says it’s empty, I’ve googled and can’t really understand exactly what they want me to do. Could someone write me a simple step by step method of fixing this issue?

I can send screenshots if what I’m saying doesn’t make sense

@RockyQ
Welcome to Shopify Community,
It’s difficult to write or guide you step by step.
Kindly Check out this tutorials.
https://www.youtube.com/watch?v=DMZnywUDYcE

I’ve now added it to the navigation menu but it is still not showing up on my site